Key parameters at a glance

A radius of 4.54 Earth radii
A mass of 18.70 Earth masses
Surface gravity around 0.91 g
An orbital period of 56.359 days
Semi-major axis 0.2698 AU
Equilibrium temperature 419 K (146 °C)
Distance from Earth 3,140.52 light-years
Earth Similarity Index 0.450
Travel time at Voyager 1 speed 55,383,014 years

Kepler-1752 b Planet Profile

Physical Specs

Radius

4.54 R⊕

Radius (Jupiter)

0.405 R♃

Mass

18.70 M⊕

Mass (Jupiter)

0.059 M♃

Density

1.10 g/cm³

Surface Gravity

0.91 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.450

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#459of 574

top 79.8%

This planet

4.54R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-6041 b 4.55 R⊕ HIP 71135 b 4.55 R⊕ Kepler-1764 b 4.56 R⊕

Metric	Earth	Kepler-1752 b	Jupiter
Radius (R⊕)	1.00	4.54	11.21
Mass (M⊕)	1.00	18.70	317.83
Density (g/cm³)	5.51	1.10	1.33
Surface Gravity (g)	1.00	0.91	2.53
Insolation (S⊕)	1.00	7.29	0.037

Star Catalogue Identifiers

TIC

TIC 417655835

Gaia DR2

Gaia DR2 2136207095405014912

Gaia DR3

Gaia DR3 2136207095405014912

System

Kepler-1752

Percentile among Neptune-like cohort

Radius 4.541 R⊕ · percentile 20 / cohort 574

Mass 18.700 M⊕ · percentile 24 / cohort 574

Orbital period 56.36 d · percentile 73 / cohort 524

Distance 962.89 pc · percentile 72 / cohort 572

ESI 0.450 · percentile 81 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

56.359 days

Semi-major axis

0.2698 AU

Eccentricity

0.000

Inclination

88.46 °

Year Length

A year here lasts approximately 56.36 Earth days (15.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2698 AU.

Transit Fingerprint

Depth

0.256 %

Duration

6.927 h

Impact parameter b

0.906

Rp / R★

0.056204

Transit midpoint (BJD)

2,455,055.2901

Photometric dip

Transit produces a flux drop of 2,560 ppm lasting ≈ 6.93 h.

Extended Orbital Architecture

Planet / star radius ratio

0.056204

Semi-major axis / stellar radius

33.700

Impact parameter (b)

0.906

Transit mid-time (BJD)

2,455,055.2901

Angular separation (arcsec)

0.28000

Eq. Temperature

419K

(146 °C)

Insolation (S⊕)

7.29

Earth = 1.00

Earth Similarity (ESI)

0.450

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1752

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,446 K — cooler than the Sun (5,778 K)

Estimated Age

7.20 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.821 R☉

Stellar Mass

0.824 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.525 dex

Stellar density

0.229 g/cm³

Metallicity ratio

[Fe/H]

Distance

962.89 parsec

Light-years 3,140.52 ly

V-band magnitude

16.02 mag

Voyager-speed travel 55,383,014 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

1.010 mas

Total Proper Motion

14.511 mas/yr

PM Right Ascension

-5.98 mas/yr

PM Declination

-13.22 mas/yr

Galactic Cartesian (pc)

x = 0.223 · y = -0.585 · z = 0.780

Equatorial (J2000)

RA 290.85414° · Dec 51.22274°

Galactic ℓ, b

82.717° · 16.138°

Ecliptic λ, β

314.498° · 71.453°

HTM-20 index

219547961